C341 Exam Review

Which of the following is true?

• A stereocenter has to have 4 different substituents while a chiral center doesn't

• A stereocenter is not defined by chirality but by its ability to form stereoisomers

• Chiral centers require the molecule to be able to be superimposed upon itself

• Chiral centers can only be present if there is a plane of symmetry

What is the main difference between R/S and E/Z stereocenters?

• R/S stereocenters only apply to achiral molecules

• E/Z stereocenters only apply to alkenes and cyclic molecules

• There is no difference because E/Z is just cis/trans

• R/S stereocenters can be inverted or unanimous while E/Z cannot

Match the following

• Superimposable mirror images

• Achiral Molecule

• 4 different substituents attached to a C

• Achiral

• Non-superimposable mirror images

• Stereocenter

• Atom where stereoisomer can be produced

• Chiral

• Has at least 1 achiral conformation

• Chiral Center

A chiral center is a type of (a)   , but not all stereocenters are ​ (b)   .

• stereocenter
• chiral centers

In the following molecule, the circled region is . . .

• An R stereocenter

• An S Stereocenter

• An E Stereocenter

• A Z stereocenter

• None of these

Which of the following is present in this molecule?

• An R stereocenter

• An S stereocenter

• An E stereocenter

• A Z stereocenter

• None of these

Which of the following is present in this molecule?

• R stereocenter

• S stereocenter

• E stereocenter

• Z stereocenter

• None of the above

Match the following!

• Diastereomers

• Same connectivity and molecular formula, but atoms are arranged differently in space

• Stereoisomers

• Same molecular formula, different connectivity

• Constitutional Isomers

• Non-superimposable mirror images

• Enantiomers

• Same connectivity, different inner atom distances

For this molecule, looking down the 3,4 bond, what is the most accurate Newman Projection?

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For this molecule, looking down the 3,4 bond, what is the most accurate Newman Projection?

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